====== Create a Product Catalogue ======
You can use the Content service to create a catalogue of products with corresponding descriptions. Using this service to sell keys is not mandatory for resellers. \\
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You don't need to authorize to use most Content service methods. \\
== Common scenario of content retrieval ==
  - The customer can use the [[ru:apiv2:methods:getavaliablecountries|GetAvaliableCountries]] method to retrieve a list of available countries.\\ // In some cases, a single family/product may have different descriptions for different countries. As these products are rare, 
  the most common country code for all translations is DF (Default). It means that a product with this country 
  code will have identical translations in all languages regardless of the country, except individual descriptions with a country code different from DF.//
  - The customer can use the [[ru:apiv2:methods:getdefaultmenu|GetDefaultMenu]] (Content) method to retrieve a category tree
  - The customer can obtain a list of all available languages using [[ru:apiv2:methods:getavaliablelanguages|GetAvaliableLanguages]] (Content)
  - Each tree item in the [[en:content:types:menucontract|MenuElementContract]] menu has the FamilyGroupIds property with a list of ID's assigned to this category (menu item). The customer can use the price list (where each item has a FamilyID) to calculate which menu items are available for sale (have at least 1 product). Potential algorithm
  - Then, the customer downloads a description for each available product or family in a desired language using the [[ru:apiv2:methods:getfamily|GetFamily]] and [[en:apiv2:methods:getproduct|GetProduct]] (Content) methods
== Additional scenario of content retrieval ==
To avoid requesting descriptions of all available products every time, the customer may only retrieve a list of families/products that have lately been modified in any way. 
To do this, use the [[ru:apiv2:methods:getchanges|GetChanges]] (Content) method. This method uses the last requested content version as input.